1 /*- 2 * SPDX-License-Identifier: ISC 3 * 4 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 5 * Copyright (c) 2002-2008 Atheros Communications, Inc. 6 * 7 * Permission to use, copy, modify, and/or distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 * 19 * $FreeBSD$ 20 */ 21 #include "opt_ah.h" 22 23 #include "ah.h" 24 #include "ah_internal.h" 25 26 #include "ar5212/ar5212.h" 27 #include "ar5212/ar5212reg.h" 28 #include "ar5212/ar5212desc.h" 29 30 /* 31 * Notify Power Mgt is enabled in self-generated frames. 32 * If requested, force chip awake. 33 * 34 * Returns A_OK if chip is awake or successfully forced awake. 35 * 36 * WARNING WARNING WARNING 37 * There is a problem with the chip where sometimes it will not wake up. 38 */ 39 static HAL_BOOL 40 ar5212SetPowerModeAwake(struct ath_hal *ah, int setChip) 41 { 42 #define AR_SCR_MASK \ 43 (AR_SCR_SLDUR|AR_SCR_SLE|AR_SCR_SLDTP|AR_SCR_SLDWP|\ 44 AR_SCR_SLEPOL|AR_SCR_MIBIE|AR_SCR_UNKNOWN) 45 #define POWER_UP_TIME 2000 46 uint32_t scr, val; 47 int i; 48 49 if (setChip) { 50 /* 51 * Be careful setting the AWAKE mode. When we are called 52 * with the chip powered down the read returns 0xffffffff 53 * which when blindly written back with OS_REG_RMW_FIELD 54 * enables the MIB interrupt for the sleep performance 55 * counters. This can result in an interrupt storm when 56 * ANI is in operation as no one knows to turn off the MIB 57 * interrupt cause. 58 */ 59 scr = OS_REG_READ(ah, AR_SCR); 60 if (scr & ~AR_SCR_MASK) { 61 HALDEBUG(ah, HAL_DEBUG_ANY, 62 "%s: bogus SCR 0x%x, PCICFG 0x%x\n", 63 __func__, scr, OS_REG_READ(ah, AR_PCICFG)); 64 scr = 0; 65 } 66 scr = (scr &~ AR_SCR_SLE) | AR_SCR_SLE_WAKE; 67 OS_REG_WRITE(ah, AR_SCR, scr); 68 OS_DELAY(10); /* Give chip the chance to awake */ 69 70 for (i = POWER_UP_TIME / 50; i != 0; i--) { 71 val = OS_REG_READ(ah, AR_PCICFG); 72 if ((val & AR_PCICFG_SPWR_DN) == 0) 73 break; 74 OS_DELAY(50); 75 OS_REG_WRITE(ah, AR_SCR, scr); 76 } 77 if (i == 0) { 78 #ifdef AH_DEBUG 79 ath_hal_printf(ah, "%s: Failed to wakeup in %ums\n", 80 __func__, POWER_UP_TIME/50); 81 #endif 82 return AH_FALSE; 83 } 84 } 85 86 OS_REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); 87 return AH_TRUE; 88 #undef POWER_UP_TIME 89 #undef AR_SCR_MASK 90 } 91 92 /* 93 * Notify Power Mgt is disabled in self-generated frames. 94 * If requested, force chip to sleep. 95 */ 96 static void 97 ar5212SetPowerModeSleep(struct ath_hal *ah, int setChip) 98 { 99 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); 100 if (setChip) 101 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_SLP); 102 } 103 104 /* 105 * Notify Power Management is enabled in self-generating 106 * fames. If request, set power mode of chip to 107 * auto/normal. Duration in units of 128us (1/8 TU). 108 */ 109 static void 110 ar5212SetPowerModeNetworkSleep(struct ath_hal *ah, int setChip) 111 { 112 OS_REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV); 113 if (setChip) 114 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLE, AR_SCR_SLE_NORM); 115 } 116 117 /* 118 * Set power mgt to the requested mode, and conditionally set 119 * the chip as well 120 */ 121 HAL_BOOL 122 ar5212SetPowerMode(struct ath_hal *ah, HAL_POWER_MODE mode, int setChip) 123 { 124 #ifdef AH_DEBUG 125 static const char* modes[] = { 126 "AWAKE", 127 "FULL-SLEEP", 128 "NETWORK SLEEP", 129 "UNDEFINED" 130 }; 131 #endif 132 int status = AH_TRUE; 133 134 HALDEBUG(ah, HAL_DEBUG_POWER, "%s: %s -> %s (%s)\n", __func__, 135 modes[ah->ah_powerMode], modes[mode], 136 setChip ? "set chip " : ""); 137 switch (mode) { 138 case HAL_PM_AWAKE: 139 if (setChip) 140 ah->ah_powerMode = mode; 141 status = ar5212SetPowerModeAwake(ah, setChip); 142 break; 143 case HAL_PM_FULL_SLEEP: 144 ar5212SetPowerModeSleep(ah, setChip); 145 if (setChip) 146 ah->ah_powerMode = mode; 147 break; 148 case HAL_PM_NETWORK_SLEEP: 149 ar5212SetPowerModeNetworkSleep(ah, setChip); 150 if (setChip) 151 ah->ah_powerMode = mode; 152 break; 153 default: 154 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown power mode %u\n", 155 __func__, mode); 156 return AH_FALSE; 157 } 158 return status; 159 } 160 161 /* 162 * Return the current sleep mode of the chip 163 */ 164 HAL_POWER_MODE 165 ar5212GetPowerMode(struct ath_hal *ah) 166 { 167 /* Just so happens the h/w maps directly to the abstracted value */ 168 return MS(OS_REG_READ(ah, AR_SCR), AR_SCR_SLE); 169 } 170 171 #if 0 172 /* 173 * Return the current sleep state of the chip 174 * TRUE = sleeping 175 */ 176 HAL_BOOL 177 ar5212GetPowerStatus(struct ath_hal *ah) 178 { 179 return (OS_REG_READ(ah, AR_PCICFG) & AR_PCICFG_SPWR_DN) != 0; 180 } 181 #endif 182